A Toothache can be caused by many different factors.Decay: If the tooth is decayed it can cause pain to hot/cold. This needs to be treated as soon as possible with a simple filling to try and prevent the nerve from becoming infected.MS Dental Provides in Toothache Treatment in Singleton. Call us for Singleton: (02) 6572 2526 . https://www.msdental.com.au/our-services/toothache/